Ore-crushing mill



(No Model.) V 3 Sheets-Sheet 1.

H. P.- HOLLAND.

ORE GRUS'HINGMILL.

3 Sheets-Sheet 2.

(No Model.)

- H. P. HOLLAND ORE GRUSHING MILL.

N0. 557,529. 5 Patented Mar.31,1896.

(No Model.) 3 Sheets-.Sheet 3.

l 4 H. P. HOLLAND. ORE GRUSHING MILL.

No. 557,529. Patented Mar.-31, 1896.

Lullllll "I ANDREW B GRAHAM. PHUTU'LITHOYWASNINGTON D C.

UNITED STATES PATENT OFFICE.

HENRY P. HOLLAND, OF OAKLAND, CALIFORNIA.

ORE-CRUSHING MILL.

SPECIFICATION forming part of Letters Patent No. 557,529, dated March 31, 1896.

Application filed June 13,1895. Serial No. 552,730. (No model.)

To all whom it may concern.-

Be it known that I, HENRY P. HOLLAND, a citizen of the United States, residing at Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Ore-Crushing Mills; and I do hereby declare the following to be a full, clear, and exact description of said invention, such as will enable others skilled in the art to which it most nearly appertains to make, use, and practice the same.

My present invention relates to an orccrushing mill of novel and peculiar construction which forms one part of a newly-devised system of ore-reduction works which I am proceeding to secure in detail by Letters Patcut. This present machine, however, can also be used as an ore-crushing mill in connection with other systems of ore treatment, and its many advantages will result in a great saving in the cost of recovering the precious metals from ores.

The general features of my improved orecrusher may be stated as follows: It has a system of roller-crushers suspended between two opposing pressure forces, so that they are held practically immovable in a vertical clirection between said forces, the entire machine at the same time being adapted to rotate and carry the rollers in a fixed close proximity to the dies in the battery, thereby giving a powerful crushing effect without any direct contact of iron against iron. The pressures are controllable, so that the crushing force of the rollers can be increased or diminished without varying the weight of the mechanism, and the whole is adapted to be rotated at a high rate of speed, whereby the momentum is utilized as an important crushing factor.

Referring to the accompanying drawings, Figure 1 is a vertical elevation, partly in section and partly broken away. Fig. 2 is a top plan section taken on line 03 as of Fig. 1. Fig. 3 is a bottom detail plan of hydraulic distributer to rollers. Fig. 4 is a top detail plan, partly broken, of driving-gear. Fig. 5 is a detail top plan of rollersupports through line .2 on Fig. 1. Fig. 6 is a detail top plan of pressure-roller through line y y on Fig. 1.

,Fig. 7 is a detail top plan of swinging box through line Z Z on Fig. 1. Fig. 8 is a detail front elevation of same. Fig. 9 is a detail top plan of lower box and adjusting-screw; and Fig. 10 is a detail elevation,partly broken, of one of the hydraulic pressure-cylinders.

Let A, Fig. 1, represent the battery.

B is the circular die, and O the opposing crushing-rollers between which the crushing is effected.

D is the surrounding screen through which the pulp is washed when it is ground sufficiently fine.

E is the feed-opening through which the ore is fed into the battery.

F is avertical shaft which steps in a socketbearing in the top of the central post or pedestal G, which extends upward in the center of the battery. The upper end of this shaft is supported in bearings, which bearings form part of the framework of the mill, as hereinafter described.

Secured to the shaft F, between the bat tery and upper bearings, are two sets of radiating arms, which incline downward. The lower set II II is placed at a short distance above the battery, while the upper set I I is placed at a short distance above the lower set H H, and they are secured firmly to the shaft, so that they rotate with it. The shaft carries four (more or less) radial arms, as shown at Fig. 2, Sheet 2, according to the number of crushing-rollers to be carried, and each arm is composed of four parallel members, which are placed at a short distance apart, so that the space between them forms a guidingtrack, as will be seen farther on, and their outer ends are connected and braced by trans verse bars or plates. These arms serve to support and carry the shafts J of the crush ing-rollers, which are mounted at an angle of about forty-five degrees, (more or less,) so that momentum will result in a downward and outward direction, and the angle of inclination of the arms is such as to secure a rectangular relation between the shaft and the arms.

Each roller-shaft J passes freely through guiding-blocks K, which are supported between the members of the upper and lower inclined arms, and the shaft is maintained in position by a screw-collar L at its upper end. The under face of this collar rests upon a series of antifriction-rollers a a a, which are carried by a ring I) and rest upon and travel on a block cl, which is secured upon an adjustable cross-bar e, as hereinafter described.

Secured upon each roller-shaft J, above the lower inclined arms, is a fixed flange or collar f, upon which a series of antifriction-rollers g g g are mounted on a ring h, so that they will travel around on the flange. Above this series of rollers and resting upon them is a block M, through which the roller-shaft freely passes and rotates. A lever-bar N, the outer end of which is pivoted to one of the upright connecting-bars of the arm-frame, passes across this block and bears near its middle upon the block, while its free end is arranged to be acted upon by a hydraulic or pneumatic plunger, as hereinafter detailed. Each roller-shaft J also passes freely through the sliding cover of the battery, and the cover is connected by bars 7t" 7a with the lower inclined arms, so that the cover moves with the arms and shafts.

The upper blocks K, through which the roller-shafts J pass, are mounted on trunnions pp between the pair of arms, as shown in Fig. 7 while the blocks K on the lower sets of arms are adjustable lengthwise of the arms by means of hand-screws Q, so that when the lower ends of the shafts are adjusted by means of the hand-screws the pivotal point of each shaft is the trunnions of the upper blocks. To accommodate the bearing-surface at the upper end of each shaft to this adj ustment the block 1), upon which the antifriction-rollers a a bear, is concave on the under side and rests upon the upper convex side of a block R, which is secured to the adjustable cross-bar 6. This arrangement preserves the proper contiguity and relation of the crushing-rollers and die. The cross-bar e is adjustable by means of set-screws in order to raise or lower the crushing-rollers.

A gear-wheel U is secured to the upper end of shaft F, and the shaft is driven by a pinion V on the end of the horizontal drivingshaft TV, which gears with it. The hub of gear-wheel U has a short cylinder X extending downward from and forminga part of it, and in this cylinder is a fixed piston-head T, which rest-s upon and is permanentlysecured to the upper cross timber or beam of the millframe. block or piston-head and rotates in it.

The shaft F passes through this A water-pipe 4, which connects with a suitable pump, conducts water up through the block or piston-head and delivers it into the space between the hub of the gear-wheel and piston,

and a sufficient pressure is maintained in this cylinder to counteract by an upward lift the entire weight of the shaft F and the mechanism which it carries. Instead of this device, however, the ordinary palier glisscmt or waterbearing under the foot of the shaft may be employed.

A secondary beam Z passes across the millframe a short distance above the series of radial arms and carries a guide-box, through which shaft F passes, as stated heretofore in the specification. Within this box is an annular chamber 5, with which a pipe 6 is 0011- nected. This pipe also connects witha pump or air-reservoir, as preferred. Ordinarily I shall connect it with a closed tank in which water is contained, and into which air is forced under pressure to give the desired watenpressure in chamber 5.

The annular chamber is formed by an inverted open-ended cylinder 7, which forms a part of the guide-box. In the mouth or open end of this inverted cylinder a piston-head 8, which is fixed to the shaft and which can rotate freely in the cylinder, is placed.

Secured between the members of each upper set of arms is an upright inverted cylinder 9, in the lower open end of which is a long plunger-piston 10. This piston or plunger has an antifriction-roller11 secured at its lower end, so as to bear upon the free end of lever N, which, as before stated, presses upon the block M and through it upon the flange or collar f, which is fixed upon the roller-shaft.

A pipe 12 connects the annular chamber with the chamber of cylinder 9 above the plunger-piston, so that any desired amount of pressure may be applied to force the rollershafts outward through the medium of the plunger, lever, block, and fixed flange on the shaft, while at the same time the interposed roller-bearings permit free rotation of the shafts.

It will now be seen that the crushing-rollers are carried on shafts which, in the first place, are adjustable, so that the rollers can be set and maintained at or adjusted to any desired proximity to the dies without actually touching them. In the next place any desired amount of pressure can be applied to resist the crushing action without materially increasing the power required to drive the machine.

Power from the driving-shaft being applied to drive the verticalshaft, the piston-head T remains stationary While the shaft rotates inside of it and. the barrel or cylinder portion of the gear-wheel rotates outside of it. The upward lift of the water-pressure in the chamber of the cylinder carries the weight of the shaft and itsattachments. The piston 8, being fixed to the shaft, rotates with it and carries the feed-pipes 12, which supply pressure to the revolving pressure-cylinders 9, so that the pressure is maintained at all times while the machine is in operation.

This ore-crusher will operate with great officiency, and it will have a crushingcapacity far in excess of any crushing mechanism I have any knowledge of. One very important feature is that the crushing-rollers are held out of contact with the dies, so that the only wear of the iron is that which results from the direct crushing action of the ore.

Having thus described my invention, what I claim, and desire to secure by Letters Patcut, is-

1. In an ore-crushing mill, the combination of a main shaft, the rollers and their carrying-shafts, a battery, arms connected to said main shaft and inclined downward and outward, and guide-blocks for the roller-carrying shafts, adjustable between members of said arms, substantially as set forth.

2. In an ore-crushing mill, the combination of a main, driving-shaft, a battery into which the lower end of said shaft is stepped, a rotatable cover for said battery, crushing-rollers, shafts carrying said rollers, arms connected to said main, driving-shaft and carrying said roller-carrying shafts,and means connecting said arms to said rotatable cover, substantially as set forth.

3. In an ore-crushing mill, the combination of a battery, crushing-rollers and their shafts, a main driving-shaft, arms connected to said main driving-shaft and carrying said rollercarrying shafts, the hydraulic pistons and cylinders, and levers connected to bars of the arms carrying the roller-shafts, and adapted to be acted upon by said pistons, substantially as specified.

i. In an ore-crushing mill, the combination of a battery, a main, driving-shaft stepped in said battery, crushing-rollers and their shafts, arms connected to said main, driving-shaft and carrying said roller-shafts, blocks or supports through which pass said roller-shafts, levers fulcrumed upon bearings resting in said blocks or supports, and pivoted or connected to bars of the arms carrying the rollershafts, and means adapted to act upon the free ends of said levers, substantially as set forth.

5. In an ore-crushing mill, the combination of a battery, a main, driving-shaft stepped therein, crushing-rollers and their shafts, arms connected to said main, driving-shaft and carrying said roller-shafts, flanges secured to said roller-shafts, rings carrying antifriction-rollers traveling upon said flanges, blocks resting upon said antifriction-rollers,

levers fulcrumed upon said blocks and connected to bars of the said arms, and means for acting upon the free ends of said levers, substantially as set forth.

6. In an ore-crushing mill, the combination of crushing-rollers and their carrying-shaft, with the piston-head suitably supported in position and a cylinder or chamber formed on the driving-gear of said shaft and adapted to encompass said piston-head, and means to supply water or pressure to said cylinder or chamber, substantially as set forth.

7. In an ore-crushing mill, the combination of the Vertical shaft having arms carrying shafts provided with crushing-rollers, the cylinder or chamber X fixed to the upper end of said vertical shaft and formed with the driving-gear of said shaft, the fixed piston-head fitting said cylinder or chamber, and watersupply pipe for said chamber or cylinder, substantially as set forth.

8. The gear-wheel U fixed to the upper end of shaft F, having the short cylinder X formed integral with it, in combination with the stationary piston T and its water-pipe 4, substantially as described.

9. In an ore-crushing mill, having a series of crushing-rolls carried on arms radiating from a main upright shaft, and having a cylinder 9 mounted on the radiating arms, with a piston-plunger 11 adapted to press upon a pressure-lever N, connected to a bar of said arms the combination of a stationary inverted cylinder 7 surrounding the shaft and connected with a water-supply by pipe 6 with a piston-head 8 secured to the shaft and a pipe 12 for connecting the water-spaces in the two cylinders 9, 7, substantially as described.

In testimony whereof I have hereunto signed my name in the presence of two witnesses.

HENRY P. HOLLAND. lVitnesses A. J. ROBINSON, CHAS. J. ARMBRUSTER. 

